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erastova [34]
3 years ago
14

Describe one model of the structure of a nucleus.

Biology
1 answer:
Marta_Voda [28]3 years ago
5 0
Nucleus for what?

Atom? Animal Cell? Plant Cell? Each have different structures.
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Which type of muscle is striated?<br> a skeletal<br> b smooth<br> c cardiac<br> d both a and c
jeka57 [31]
D both a and c can be striated
7 0
3 years ago
Describe the mechanisms in place to prevent the blood from flowing in the wrong direction through the heart.
Alecsey [184]
 the heart has valves in place to prevent the backflow of blood.
3 0
3 years ago
Refer to the Biochemistry in Focus section of your text for this chapter to answer this question. A mutation in Complex I decrea
quester [9]

Answer:

Complex II

Explanation:

The electron transport chain refers to a group of electron transporters embedded in the inner mitochondrial membrane that transfer electrons from electron donors to electron acceptors which undergo redox (reduction and oxidation) reactions. The energy released during the transfer of electrons is coupled to the transfer of protons (H+) from the mitochondrial matrix into the intermembrane space, generating an electrochemical gradient that is then used to synthesize ATP. Complex I and Complex II are membrane-bound complexes that act as mitochondrial redox carriers. Complex I is a proton pump that uses energy from the electron transfer chain to pump protons, while Complex II sends H+ onto Complex III in the form of the reduced ubiquinol. Complex I receives electrons from NADH and transfers them to ubiquinone, while Complex II directly receives the redox cofactor FADH2 that does not pass through Complex I.

8 0
3 years ago
In a titration experiment, a 10.00 ml sample of H2SO4 was titrated with 33.25 mL of 0.777 M KOH.
german

Answer:

1.292 M

Explanation:

<em>In order to calculate the concentration of H2SO4, we need to get the balanced equation of reaction first;</em>

H_2SO_4 + 2KOH --> K_2SO_4 + 2H_2O

Using the formula:

CaVa/CbVb = na/nb

where Ca = concentration of acid, Va = volume of acid, Cb = concentration of base, Vb = volume of base, na = number of moles of acid, and nb = number of moles of base.

In this case, Ca =?, Va = 10.00 ml, Cb = 0.777, Vb = 33.25 ml, na = 1, nb = 2

Ca = CbVbna/Vanb = 0.777 x 33.25 x 1/10 x 2

Ca = 1.292 M

Hence, the concentration of H2SO4 is 1.292 M

6 0
4 years ago
The DNA in a cell's nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well
Harrizon [31]

The question is incomplete. The part of the question after this is: Assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.

Answer:

PFK: cytoplasm

insulin: ER--> Golgi--> outside cell

Explanation:

The proteins which are made and have to function in the same cell like Phosphofructokinase (PFK) do not have to undergo the modification processes which are required fro transporting a protein. Such kind of proteins are translated in the free cytoplasmic ribosomes and released into the cytoplasm where they start to function.

The proteins like insulin need to be traveled to different cells where they have to function. Such kind of proteins are formed in the ribosomes which have rough Endoplasmic Reticulum attached to them. From here, they travel to the Golgi complex where they are modified and packaged. From the Golgi-complex, these proteins are moved out of the cell.

5 0
3 years ago
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